Nitro is very popular in Europe, but hasn't caught on as much in the US. In general, they seem to make a great product. Their Gullwing tech is similar to Mervin's C2 and NS' RC, which is proven to kick ass. I've been tempted by their deal on that board too, in a 159. I'm just not sure how the flex is, b/c at that size I want it to be on the upper end of a medium flex. In the video on Sierra's site, the dude classifies it as a freestyle stick, which should still be fine for AM use for most people, but I'm not sure if it would be stiff/responsive enough for the charging I'd do with it.
16 Capita BSOD . 16 NS West . 15 NS Snowtrooper BIA . 13 Salomon Pow Snake
15 Now Drive . 14 Burton Genesis
14 Flow Hylite